What is the inverse of division?
multiplication
Simplify 2x2 - 4x -x2
x2-4x
5p - 1 = 2p + 20
What is p = 7?
12x = 4(x + 5)
What is x = 20/8 or 2.5?
3y − 5y + 10 = 36
What is y = -13?
What is the inverse of addition?
subtraction
-3(4x-3) - 9
-12x
-2x+ 4= 10
x=-3
15x - 3(3x + 4) = 6
What is x = 3?
-9x + 21 +11x + 21 = 2
What is x = -20?
define "like terms"
Terms with the same variable with the same exponent
6xy-2y+6x2y +6y
6xy + 4y +6x2y
-9 x + 8 = -55
-7 x - 2 = 12
What is x = 7 and -2?
2(x − 4) = 4(2x + 1)
What is x = -2?
6n + 12 - 8n = 22
What is n = -5?
After simplifying the expressions on both sides of an equation, what is step 2?
collect the variables using inverse operations
-(-x + 2) - (x +2)
4
2(y-9) = -(-y + 18)
y=0
3(x + 2) − 2(x + 1) = 8
What is x = 4?
-2x + 15 + 4x + 15 = –6
What is x = -18?
How are expressions and equations different?
Equations have an = sign.
3y - 8x + 6y + 8x -9y
0
2(x-3)/4 = 36
What is x =15
−2(1 − 4x) = 3x + 8
What is x =2?
2m− (m+ 1) = 0
What is m = 1?